Subwavelength-Scale 2D Superoscillatory Beam Scanning in Huygens' Box for Wireless Power Delivery

In this work, we address the critical challenge of powering miniature implantable neurostimulation devices, essential for treating refractory neurological and psychiatric disorders. Our research introduces a novel wireless power transmission method employing superoscillatory waveforms within a parallel-plate cavity, operating at 1 GHz. This innovative technique enables the focusing of electromagnetic energy to subwavelength scales, achieving a Full Width at Half Maximum of just 0.35λ. Remarkably, this surpasses the resolution of diffraction-limited and Bessel function. Central to our approach is the utilization of a Huygens' Box model, allowing for precise control and dynamic steering of the energy beam within the cavity. This method not only provides power delivery to deeply implanted devices but also facilitates non-invasive and targeted energy delivery to localized tissue. Our findings hold significant promise for advancing therapeutic interventions in the realm of neurostimulation, marking a step forward in the integration of advanced electromagnetic techniques in medical applications.